Stage 1 hot chip for stock engines, stage 2 chip for cam upgraded engines with stock heads and then custom chips for head and cam changes. First chip will be the stage 1 hot chip for stock heads and cam. Any bolt ons like headers, intake and air filter setups are fine with this level chip. Once you order your chip, you need to click the contact form menu item at the top and fill out the form with all your vehicle information as to what year, engine and transmission it has and any modfications you have. I will need the 4 letter code off of your original chip.